/*
 * Copyright 2007-2008  Lukasz Laszko lukaszlaszko@gmail.com
 * 
 * Permission to use, copy, modify, and distribute this software
 * and its documentation for any purpose and without fee is hereby
 * granted, provided that the above copyright notice appear in all
 * copies and that both that the copyright notice and this
 * permission notice and warranty disclaimer appear in supporting
 * documentation, and that the name of the author not be used in
 * advertising or publicity pertaining to distribution of the
 * software without specific, written prior permission.
 * 
 * The author disclaim all warranties with regard to this
 * software, including all implied warranties of merchantability
 * and fitness.  In no event shall the author be liable for any
 * special, indirect or consequential damages or any damages
 * whatsoever resulting from loss of use, data or profits, whether
 * in an action of contract, negligence or other tortious action,
 * arising out of or in connection with the use or performance of
 * this software. 
 */
package org.pg.biomedics.asr.service;

import org.pg.biomedics.asr.concurrent.TaskScheduler;
import org.pg.biomedics.asr.concurrent.TaskSchedulerException;

/**
 * Synchronized singelton services pool
 * @author Lukasz Laszko
 */
public final class ServicesPool 
{
    // <editor-fold desc="Fields">
    
    private static ServicesPool instance;
    
    private CommonService commonService;
    private TaskScheduler taskScheduler;
    
    // </editor-fold>
    
    // <editor-fold desc="Constructors">
    
    private ServicesPool() {}
    
    // </editor-fold>
    
    // <editor-fold desc="Properties">
    
    /**
     * Gets instance of CommonService
     * @return common service instance
     */
    public synchronized CommonService getCommonService()
    {
        return this.commonService;
    }
    
    /**
     * Gets instance of task scheduler
     * @return task scheduler instance
     */
    public synchronized TaskScheduler getTaskScheduler()
    {
        return this.taskScheduler;
    }
    
    /**
     * Sets task scheduler managed by this pool
     * @param taskScheduler
     */
    public synchronized void setTaskScheduler(TaskScheduler taskScheduler)
    {
        this.taskScheduler = taskScheduler;
    }
    
    // </editor-fold>
    
    // <editor-fold desc="Static methods">
    
    /**
     * Gets instance of services pools. This method supports lazy init
     * @return
     */
    public static synchronized ServicesPool getInstance()
    {
        if (instance == null)
            instance = new ServicesPool();        
        
        return instance;
    }       
    
    // </editor-fold>       
    
    // <editor-fold desc="Methods">
    
    /**
     * Provides services initialization and configuration     
     * @param configureScheduler
     * @throws org.pg.biomedics.asr.logic.ServiceException
     */
    public void configure(boolean configureScheduler) throws ServiceException, TaskSchedulerException
    {        
        commonService = new CommonService();
        
        if (configureScheduler)
        {
            this.taskScheduler = new TaskScheduler();
            this.taskScheduler.initialize();
        }
    }
    
    // </editor-fold>
}
